Thread: TR7A problem
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Old December 9th 08, 05:13 AM posted to rec.radio.amateur.boatanchors
Stanley Miln Stanley Miln is offline
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First recorded activity by RadioBanter: Dec 2008
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Default TR7A problem

Drake is still in Business. Contact them. they may still
service the TR7.
stan
I have a TR7A that is very weak on receive and will not transmit. The +10T
and +10R lines operate normally when PTT is selected and I press the mic
switch. All receive functions seem to work correctly, but the receive
signal level for even very strong signals is too low to produce any AGC
action. If I back off on the RF gain the S meter does register, so it
doesn't look like an AGC problem. The -5 volt line is only -3.something,
but the +24 line and +10 supply are within specs. The output of the
multivibrator / bridge rectifier for the +24V is within spec as well.

If anyone has seen this kind of problem and can tell me where to start
looking, I would appreciate it.

73,
Bob AD3K